package hongjiang.info

object Pitfalls5 extends App {
  object Cache {
    def >>:(data: String): Cache.type = {//中缀操作符
      println(data); Cache
    }
  }
  "data2" >>: "data1" >>: Cache
  val x: String Map Int = null //当一个高阶类型有2个参数化类
  
  //unapply返回二元组

}